Hatsan Vortex gas piston technology is developed and manufactured by Hatsan to be specifically used in most Hatsan break barrel and under lever airguns. Vortex gas pistons utilize regular air instead of any other type of gas. Gas piston power provides a smoother and quieter shooting experience, so you can forget about the grinding noise a spring powered gun can make. Cocking a vortex gas piston is also much smoother than a spring piston. The life of your Striker 1000s Vortex air rifle with cycle past your other springers, since you won't have to worry about spring fatigue or many moving parts. This rifle will provide you with quiet accuracy and all the features that come with a Hatsan air rifle.